Numerical Research on Pressure Fluctuation Characteristics of Small-Scale and High-Speed Automotive Pump
Rotor–stator interaction and the coupling between the clearance flow and main flow amplify the flow complexity in small-scale, high-speed automotive pumps. This degrades the pressure fluctuations, compromising the operational stability of these pumps. To better understand the pressure fluctuation di...
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MDPI AG
2025-07-01
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| Series: | Machines |
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| Online Access: | https://www.mdpi.com/2075-1702/13/7/584 |
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| author | Lulu Zheng Xiaoping Chen Jinglei Qu Xiaojie Ma |
| author_facet | Lulu Zheng Xiaoping Chen Jinglei Qu Xiaojie Ma |
| author_sort | Lulu Zheng |
| collection | DOAJ |
| description | Rotor–stator interaction and the coupling between the clearance flow and main flow amplify the flow complexity in small-scale, high-speed automotive pumps. This degrades the pressure fluctuations, compromising the operational stability of these pumps. To better understand the pressure fluctuation distribution characteristics within such a pump, the Reynolds-averaged Navier–Stokes equations and the shear stress transport <i>k-ω</i> turbulence model were applied to numerically compute the pump. The simulation results were compared with experimental data, and good agreement was achieved. The results show that pressure fluctuations in the main flow region are mainly dominated by the blade passing frequency, and the intensity of pressure fluctuations in the near-field area of the tongue reaches its peak value, showing significant fluctuation characteristics. Significant peak signals are captured in the low-frequency band of pressure fluctuations in the clearance region. The pressure fluctuation characteristics are also affected by the rotor–stator interaction between the impeller front shroud and the volute casing, while the dominant frequency is still the blade passing frequency. In addition, the dominant frequencies of pressure fluctuations in the main and clearance flows show a similar distribution to the flow rate, but the minimum amplitude corresponds to different flow rates. |
| format | Article |
| id | doaj-art-86c02e65d3374d0ebbf548ff427eb015 |
| institution | DOAJ |
| issn | 2075-1702 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj-art-86c02e65d3374d0ebbf548ff427eb0152025-08-20T03:08:01ZengMDPI AGMachines2075-17022025-07-0113758410.3390/machines13070584Numerical Research on Pressure Fluctuation Characteristics of Small-Scale and High-Speed Automotive PumpLulu Zheng0Xiaoping Chen1Jinglei Qu2Xiaojie Ma3School of Mechanical Engineering, Henan Institute of Technology, Xinxiang 453003, ChinaZhejiang Key Laboratory of Multiflow and Fluid Machinery, Zhejiang Sci-Tech University, Hangzhou 310018, ChinaSchool of Mechanical Engineering, Henan Institute of Technology, Xinxiang 453003, ChinaSchool of Mechanical Engineering, Henan Institute of Technology, Xinxiang 453003, ChinaRotor–stator interaction and the coupling between the clearance flow and main flow amplify the flow complexity in small-scale, high-speed automotive pumps. This degrades the pressure fluctuations, compromising the operational stability of these pumps. To better understand the pressure fluctuation distribution characteristics within such a pump, the Reynolds-averaged Navier–Stokes equations and the shear stress transport <i>k-ω</i> turbulence model were applied to numerically compute the pump. The simulation results were compared with experimental data, and good agreement was achieved. The results show that pressure fluctuations in the main flow region are mainly dominated by the blade passing frequency, and the intensity of pressure fluctuations in the near-field area of the tongue reaches its peak value, showing significant fluctuation characteristics. Significant peak signals are captured in the low-frequency band of pressure fluctuations in the clearance region. The pressure fluctuation characteristics are also affected by the rotor–stator interaction between the impeller front shroud and the volute casing, while the dominant frequency is still the blade passing frequency. In addition, the dominant frequencies of pressure fluctuations in the main and clearance flows show a similar distribution to the flow rate, but the minimum amplitude corresponds to different flow rates.https://www.mdpi.com/2075-1702/13/7/584automotive pumpclearance flowpressure fluctuationnumerical calculation |
| spellingShingle | Lulu Zheng Xiaoping Chen Jinglei Qu Xiaojie Ma Numerical Research on Pressure Fluctuation Characteristics of Small-Scale and High-Speed Automotive Pump Machines automotive pump clearance flow pressure fluctuation numerical calculation |
| title | Numerical Research on Pressure Fluctuation Characteristics of Small-Scale and High-Speed Automotive Pump |
| title_full | Numerical Research on Pressure Fluctuation Characteristics of Small-Scale and High-Speed Automotive Pump |
| title_fullStr | Numerical Research on Pressure Fluctuation Characteristics of Small-Scale and High-Speed Automotive Pump |
| title_full_unstemmed | Numerical Research on Pressure Fluctuation Characteristics of Small-Scale and High-Speed Automotive Pump |
| title_short | Numerical Research on Pressure Fluctuation Characteristics of Small-Scale and High-Speed Automotive Pump |
| title_sort | numerical research on pressure fluctuation characteristics of small scale and high speed automotive pump |
| topic | automotive pump clearance flow pressure fluctuation numerical calculation |
| url | https://www.mdpi.com/2075-1702/13/7/584 |
| work_keys_str_mv | AT luluzheng numericalresearchonpressurefluctuationcharacteristicsofsmallscaleandhighspeedautomotivepump AT xiaopingchen numericalresearchonpressurefluctuationcharacteristicsofsmallscaleandhighspeedautomotivepump AT jingleiqu numericalresearchonpressurefluctuationcharacteristicsofsmallscaleandhighspeedautomotivepump AT xiaojiema numericalresearchonpressurefluctuationcharacteristicsofsmallscaleandhighspeedautomotivepump |